[PATCH v8 19/22] counter: Implement extension*_name sysfs attributes

[Jonathan Cameron]

On Fri, 12 Feb 2021 21:13:43 +0900
William Breathitt Gray <vilhelm.gray at gmail.com> wrote:

> The Generic Counter chrdev interface expects users to supply extension
> IDs in order to select extensions for requests. In order for users to
> know what extension ID belongs to which extension this information must
> be exposed. The extension*_name attribute provides a way for users to
> discover what extension ID belongs to which extension by reading the
> respective extension name for an extension ID.
> 
> Cc: David Lechner <david at lechnology.com>
> Cc: Gwendal Grignou <gwendal at chromium.org>
> Cc: Dan Carpenter <dan.carpenter at oracle.com>
> Signed-off-by: William Breathitt Gray <vilhelm.gray at gmail.com>
> ---
>  Documentation/ABI/testing/sysfs-bus-counter |  9 ++++
>  drivers/counter/counter-sysfs.c             | 51 +++++++++++++++++----
>  2 files changed, 50 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
> index 6353f0a2f8f8..847e96f19d19 100644
> --- a/Documentation/ABI/testing/sysfs-bus-counter
> +++ b/Documentation/ABI/testing/sysfs-bus-counter
> @@ -100,6 +100,15 @@ Description:
>  		Read-only attribute that indicates whether excessive noise is
>  		present at the channel Y counter inputs.
>  
> +What:		/sys/bus/counter/devices/counterX/countY/extensionZ_name
> +What:		/sys/bus/counter/devices/counterX/extensionZ_name
> +What:		/sys/bus/counter/devices/counterX/signalY/extensionZ_name
> +KernelVersion:	5.13
> +Contact:	linux-iio at vger.kernel.org
> +Description:
> +		Read-only attribute that indicates the component name of
> +		Extension Z.

Good to say what form this takes.

> +